sface/screens/mainscreen.py

   1
   2 from PyQt4.QtCore import Qt, QString, SIGNAL
   3 from PyQt4.QtGui import QWidget, QLabel, QTreeView, QStandardItemModel, QVBoxLayout, QSizePolicy
   4
   5 from sfa.util.rspecHelper import RSpec
   6
   7 from sface.sficonfig import config
   8 from sface.screens.sfascreen import SfaScreen
   9
  10
  11 class SliceWidget(QWidget):
  12     def __init__(self, parent=None):
  13         QWidget.__init__(self, parent)
  14
  15         self.nodeView = QTreeView(self)
  16         self.nodeView.setRootIsDecorated(False)
  17         self.nodeView.setAlternatingRowColors(True)
  18         self.nodeView.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
  19
  20         self.nodeModel = QStandardItemModel(0, 3, self)
  21         self.nodeModel.setHeaderData(0, Qt.Horizontal, QString("Testbed"))
  22         self.nodeModel.setHeaderData(1, Qt.Horizontal, QString("Hostname"))
  23         self.nodeModel.setHeaderData(2, Qt.Horizontal, QString("IsIn"))
  24
  25         self.nodeView.setModel(self.nodeModel)
  26
  27         label = QLabel("<a href='refresh'>Refresh</a>", self)
  28         label.setScaledContents(False)
  29         self.connect(label, SIGNAL('linkActivated(QString)'), self.refresh)
  30
  31         slicename = QLabel ("Slice : %s"%(config.getSlice() or "None"),self)
  32
  33         layout = QVBoxLayout()
  34         layout.addWidget(label)
  35         layout.addWidget(slicename)
  36         layout.addWidget(self.nodeView)
  37         self.setLayout(layout)
  38         self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
  39
  40
  41     # TODO: use the methods from sfa-trunk
  42     def rspec_get_networks(self, rspec_string):
  43         rspec = RSpec (rspec_string)
  44         return rspec.rspec.xpath("./network[@name]/@name")
  45     def rspec_get_xml_nodes_from_network(self, rspec_string, network):
  46         rspec = RSpec (rspec_string)
  47         return rspec.rspec.xpath("./network[@name='%s']/site/node" % network)
  48     def rspec_get_sliver_nodes_from_network(self, rspec_string, network):
  49         rspec = RSpec (rspec_string)
  50         return rspec.rspec.xpath("./network[@name='%s']/site/node[sliver]/hostname/text()" % network)
  51     def rspec_get_other_nodes_from_network(self, rspec_string, network):
  52         rspec = RSpec (rspec_string)
  53         # xxx todo - could not find the xpath syntax for 'does not have the sliver attribute'
  54         return rspec.rspec.xpath("./network[@name='%s']/site/node[~sliver]/hostname/text()" % network)
  55
  56     def refresh(self, link=None):
  57         data = SfaData()
  58         if not data.getSlice():
  59             print 'slice not set yet'
  60             return
  61         if not data.SFACE_DEBUG:
  62             rspec_string = data.getRSpecFromSM()
  63         else:
  64             print 'SFACE_DEBUG : using local file'
  65             import os
  66             rspec_string = open(os.path.expanduser("~/.sfi/%s.rspec"%data.getSlice())).read()
  67
  68         networks = self.rspec_get_networks(rspec_string)
  69         networks.reverse()
  70
  71         for network in networks:
  72 #            nodes = self.rspec_get_sliver_nodes_from_network(rspec_string, network)
  73 #            for node in nodes: self.addNode(network, node, True)
  74 #            nodes = self.rspec_get_other_nodes_from_network(rspec_string, network)
  75 #            for node in nodes: self.addNode(network, node, False)
  76             # hacky - i'm just gettin used to this xml navigation stuff
  77             xml_nodes = self.rspec_get_xml_nodes_from_network(rspec_string, network)
  78             from lxml import etree
  79             # addNode inserts before, so let's start with the ones that are not in
  80             for xml_node in xml_nodes:
  81                 if not xml_node.xpath('sliver'):
  82                     self.addNode(network,xml_node.xpath('hostname/text()')[0],False)
  83             for xml_node in xml_nodes:
  84                 if xml_node.xpath('sliver'):
  85                     self.addNode(network,xml_node.xpath('hostname/text()')[0],True)
  86
  87
  88     def addNode(self, testbed, hostname, mark):
  89         self.nodeModel.insertRow(0)
  90         self.nodeModel.setData(self.nodeModel.index(0,0), QString(testbed))
  91         self.nodeModel.setData(self.nodeModel.index(0,1), QString(hostname))
  92         if mark:msg="x"
  93         else:   msg="-"
  94         self.nodeModel.setData(self.nodeModel.index(0,2), QString(msg))
  95
  96
  97
  98 class MainScreen(SfaScreen):
  99     def __init__(self, parent=None):
 100         SfaScreen.__init__(self, parent)
 101
 102         slice = SliceWidget(self)
 103         self.init(slice, "Main Window", "PlanetLab Federation GUI")
 104 #        slice.refresh()